When your car's Check Engine light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap.
If you experience any bleeding period after this 20 days, it will probably be the real period. This normally comes at about 4 to 6 weeks after the miscarriage.
After a D and C, you may experience mild cramping and staining. You can take anti-inflammatory medicine such as ibuprofen if necessary. Menstrual cycles usually resume quickly after miscarriage, and most women will have a period within 6 weeks. If you're not ready to conceive, you can and should re-start contraception immediately after a D and C.